Data/hora: 10/06/2024 12:10:32

Provedor de dados: | 53
País: | Brazil
Título: | Agronomic performance of green cane fertilized with ammonium sulfate in a coastal tableland soil
Autores: | Oliveira,Ana Paula Pessim; Alves,Bruno José Rodrigues; Anjos,Lúcia Helena Cunha dos; Lima,Eduardo; Zonta,Everaldo; Pereira,Willian; Soares,Paula Fernanda Chaves.
Data: | 2017-04-01
Ano: | 2017
Palavras-chave: | Saccharum spp.; Sugarcane harvesting systems; Nitrogen requirements.
Resumo: | ABSTRACT The recent approach of eliminating the usage of fire for sugarcane harvesting resulted in managing the crop on a trashblanketed soil, to which a proper recommendation of N fertilization is lacking, a problem that remains in the coastal tablelands of the Espírito Santo State, Brazil. This study aimed at evaluating the effect of increasing N rates on stalk and sugar yields and the N use efficiency by the crop. The experimental area planted with sugarcane, at the first ratoon, is located in Linhares, Espírito Santo State. The treatments consisted of N rates varying from 80 to 160 kg N∙ha−1 as ammonium sulphate, and a control without N, in a completely randomized blocks experimental design. Stalk yield increased with the N rate, and fitting the results to a quadratic function suggests no response to fertilizer rates above 130 kg N∙ha−1. The highest margin of agricultural contribution was obtained at the rate of 100 kg N∙ha−1. The N use efficiency decreased from almost 49 to 38%, when the N rate increased from 100 to 160 kg N∙ha−1. There was no effect of increasing N rates on the sugar concentration, although the sugar yield response was positive and strongly influenced by the stalk production. Results showed the importance of reassessing the adequate N rate for maximizing yield in green cane production systems.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200246
Editor: | Instituto Agronômico de Campinas
Relação: | 10.1590/1678-4499.186
Formato: | text/html
Fonte: | Bragantia  v.76 n.2 2017
Fonte: | info:eu-repo/semantics/openAccess